干旱区地理2017，Vol.40Issue(5)：951-957,7.
不同情景下干旱区尾闾湖泊生态水位与需水研究——以黑河下游东居延海为例
Ecological water level and water demand of the rump lake in arid land under different scenarios: a case of East Juyanhai at the downstream of Heihe River
摘要
Abstract
Water level is one of the most important hydrological indicators of lake,which reflects effectively not only the variations of lake water volume,but also the evolution of eco-environmental conditions of the surrounding lake wetlands.This study investigated the minimum ecological water area and the lowest ecological water level of the East Juyanhai,the rump lake of the downstream of Heihe River,using lake morphology method.The ecological water demand under different scenarios was estimated based on the principle of water balance and the existing researches.We evaluated the discharging water volumes at the hydrologic section under different scenarios (hydrological frequency),considering the water consumption law of Heihe River channel.The results show as follows:(1) the minimum ecological water area and the lowest ecological water level of the east Juyanhai are 11.11 km2 and 998.78 m,respectively;(2) the minimum ecological water demand is 0.28× 108 m3;(3) in dry years (hydrological frequency =75％),the runoff at Yingluoxia and Zhengyixia hydrological stations should be no less than 10.93 × 108 m3 and 6.27 × 108 m3,respectively.In flat and abundant water years (hydrological frequency=25％ and =50％),they should be no less than 21.46× 108 m3 and 12.32× 108 m3;(4) these results are reasonable and consistent with previous studies.The research method developed in this study can be applied practically and universally to other regions for the estimation of the minimum ecological water demand.This study is of great significance for the protection of lake wetlands and the rational utilization of water resources in arid area.At the same time,it provides a scientific basis for the implementation of Ecological Water Transfer Project in Heihe River Basin.关键词
情景/尾闾湖/生态水位/需水/东居延海Key words
scenarios/rump lake/ecological water level/water demand/East Juyanhai分类
天文与地球科学引用本文复制引用
叶朝霞,陈亚宁,张淑花..不同情景下干旱区尾闾湖泊生态水位与需水研究——以黑河下游东居延海为例[J].干旱区地理,2017,40(5):951-957,7.基金项目
国家自然科学基金(91425301,71503248,91625101)资助 （91425301,71503248,91625101）
